NEW YORK 
E-book readers can relax: The electronic edition of Dan Brown's "The Lost Symbol" is coming out on the same day as the hardcover.

Doubleday announced in April that Brown's first novel since "The Da Vinci Code" was coming out Sept. 15, but had hesitated to say when the e-book would be released, leading to speculation that the publisher was concerned that digital sales, a quickly rising market, would cut into purchases of the more expensive hardcover.

But in a statement released Thursday, Doubleday spokeswoman Suzanne Herz said the e-book also would be available on Sept. 15 and cited concerns not about sales, but about "security and logistical issues," since resolved.

The book has an announced first printing of 5 million copies and is under embargo until its publication date.